A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

Note: 
The expression does not correlate in meaning with the
phrase rolling stone—a wanderer; an unsettled person: He pro-
ceeded to explain that Clyde had ever been a rolling stone —
one who preferred to wander here and there.
set the ball rolling —(also: get the ball rolling ) start or initiate
smth.: Since Malthus set the ball rolling, public opinion has
undergone profound metamorphoses.
Note: 
Neither expression correlates in meaning with the nom-
inal compound log-rolling—(sl.) mutual assistance in political
or other action (used showing disapproval): Politics should never
have been allowed to degenerate into a game of log-rolling.
set one’s mind on something • set one’s mind to
something
set one’s mind on something —wish for smth. strongly; be
determined about smth.: We’ve definitely set our minds on a
holiday in France this year.
set one’s mind to something —(also: put one’s mind to some-
thing ) devote a lot of attention to a task: Hata set his mind
to the study of Japanese policies toward the Asiatic continent.
Note: 
Neither expression correlates in meaning with the phrase
set someone in mind of something
— cause a person to remem-
ber smth.: That tune always sets me in mind of a fine summer
day.
set one’s seal to something • set the seal on
 something
set one’s seal to something —(also: put one’s seal to something )
give one’s authority to smth.: If I set my seal to this course of
action, I trust to you to see it carried through.
set the seal on something —(also: put the seal on something )
bring smth. to an end in a suitable way; formally confirm
smth.: This international award has set the seal on a long and
distinguished career.